G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 27/10 (2006.01) G02B 27/18 (2006.01) G02B 27/28 (2006.01) G02F 1/1335 (2006.01) G02F 1/13357 (2006.01)
Patent
CA 2247435
An illumination system (10) is described that efficiently produces linear polarized light for use in LCD projection. A polarizing beam splitter (16) and half-wave retarder plate (20) produce two adjacent collimated beams of light having a common polarization direction. These adjacent beams are spatially integrated (22) into a single collimated polarized beam whose aspect ratio is subsequently converted to match that of the LCD format.
L'invention concerne un système d'éclairage (10) qui produit avec efficacité une lumière polarisée linéaire et qui peut être utilisé dans un projecteur à cristaux liquides. Un appareil polarisant de division de faisceau (16) et une lame demi-onde à retardement (20) produisent deux rayons de lumière collimatés adjacents ayant une direction de polarisation commune. Ces rayons adjacents sont spatialement intégrés (22) dans un rayon polarisé collimaté unique, dont le rapport d'allongement est subséquemment converti pour correspondre à celui du format cristaux liquides.
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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